Distillability and partial transposition in bipartite systems
arXiv:quant-ph/9910022 · doi:10.1103/PhysRevA.61.062313
Abstract
We study the distillability of a certain class of bipartite density operators which can be obtained via depolarization starting from an arbitrary one. Our results suggest that non-positivity of the partial transpose of a density operator is not a sufficient condition for distillability, when the dimension of both subsystems is higher than two.
8 pages, 1 figure